Can plc and touch screen communication lines be used as plc and computer programming lines?

Yes, for example FX-USB-AW USB interface Mitsubishi FX series PLC programming cable, USB/RS422 interface adapter, with communication indicator, length 3 meters
Mitsubishi FX3UC series PLC programming cable with FX-232AWC-H RS232 interface, RS232/RS422 interface adapter with communication indicator, length 3 meters
USB-QC30R2 USB interface Mitsubishi Q series PLC programming cable, USB/RS232 interface, cable length 3 m.